Truck won't start

[BJS]

hazarding a guess is that they should be in the 275+ neighborhood, honestly I do not know what they should be on a cold engine, I suspect that you may find that yours are very very low.

I've never actually seen numbers measured cold but since that is all you can do it should give you an idea.

 

[Patrick Feeley]

The service manual only mentions that the compression test is normal when the lowest reading cylinder is within 75 percent of the highest. It then gives a reference table that has lists the lowest pressures based on the highest. The highest values range from 440 psi to 260 psi in the table. Cheers!

 

[aaklingler]

Thanks guys, I'll try to get at that in the next week or so, I'll let you know what I come up with.

 

[aaklingler]

I couldn't get it running yesterday, but I pulled some codes, truck fired.

p1211 IPR ICP pressure above/below desired Continuous and KOER on-demand test IPR valve failed, stuck, or shorted to ground

p0470 EBP Exhst press sensor ckt malfnct (96 MY) No-start or crank mode Biased sensor, open signal return

I did have the EBP unhooked but I think I got it hooked back up, it keep coming back every time we cleared it

p1212 ICP ICP volt not at expected level Crank or KOEO Biased sensor or ckt, open signal rtn, low oil in reservoir

We cleared it and it came back the next time but not after that.

P0603 PCED Powertrain Control Module KAM error No historical faults output during a KOEO test Open PCM pin, disconnected B+, faulty PCM

What do the codes mean? Can I use a icp from a 97 to check my 95? I'm going to try to check my glow plugs and relay. Which plug are the glow plugs in?

 

[DaveBen]

The KAM error is due to the batteries being disconnected or low. The P1212 is a low voltage problem. Your batteries are shot or you have a bunch of bad connections to the battery and ground. Check these. These trucks draw a lot of power when starting and you can't cheat them or NO START. When you ever replace batteries you must replace them in pairs or the new battery will die very soon. What you have is a very BIG battery in two places.

Dave

 

[aaklingler]

I'll check and make sure I'm getting 10.5v, it cranks it over like it should and I usually have a battery charger hooked up. Could it mean the icp is bad or does it mean the input volts are low. does the p1211 mean the ipr is bad?

 

[DaveBen]

"P1211 Injector Control Pressure Sensor Above / Below Desired" Looks like a bad ICP to me.

Dave

 

[aaklingler]

Glow plugs and relay are good and HPOP reservoir is full.